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The genuine Goodman B9102097 Liquid Line Cap with O-Ring is the factory sealing cap for the liquid line service port on the WAHMV4260P4ACA air handler. It protects the refrigerant circuit during service and provides a leak-tight seal, helping maintain proper system charge and preventing moisture intrusion into the line set.
This is a genuine Goodman OEM cap with a factory-spec O-ring sized for an exact, leak-free fit. Generic caps may use mismatched threads or lower-grade O-rings that weep refrigerant over time. For a sealed system, OEM is the reliable choice.
Easy — Hand-tighten onto the service port; no special tools required. A licensed technician should handle any work involving the refrigerant circuit.